What to do if mountain rose leaves turn yellow?
Known as the "green rose that never withers", mountain roses are favored by fleshy lovers because of their unique rosette plant type. However, the phenomenon of yellow leaves that often occurs during the maintenance process confuses flower friends. This article will start from three typical symptoms, systematically analyze the causes of yellow leaves and provide scientific solutions. 1. Analysis of the mechanism of yellow leaves during dormant period 1.1 Physiological characteristics of yellow leaves When the environmental temperature continues to exceed 28℃, mountain roses will activate self-protection mechanisms and enter dormant period. At this time, the outer leaves of the plant gradually yellowed and dried up, and the central leaves contracted and gathered to form a rose shape. This is a natural evolutionary feature of plants to cope with extreme climate. 1.2 Key points for maintenance during dormant period At this stage, it is necessary to maintain good ventilation in the environment and reduce the watering frequency to 1-2 times a month. It is recommended to use a point-spout pot to supply a small amount of water along the basin wall. Pay special attention to avoid water accumulation in the heart of the leaf, and use 80% sunshade net to adjust the light intensity. 2. Root system abnormalities cause yellow leaves 2.1 Diagnosis of stagnant water and rotten roots When it is found that large areas of the bottom leaves are softened and yellowed and the plants tend to topple, the root system needs to be checked immediately. Hardening the soil will form a stagnant layer, causing capillary roots to rot and unable to absorb (S-Y) points. 2.2 The emergency treatment plan uses the bamboo stick insertion method to detect soil moisture. If the moisture is greater than 70% for 3 consecutive days, removal treatment is needed. After soaking the roots in carbendazim solution (1:1000) for 20 minutes, replace them with a new substrate containing 40% particulate soil (red jade soil + deer swamp soil). 3. Responding to the imbalance of the light environment 3.1 Graded management of light intensity. Full sunshine (6-8 hours) can be accepted in spring and autumn, and segmented shading is implemented in summer: use double sunshade nets at 10-15 o'clock to maintain the light intensity at 15,000 - 20,000 Lux; In winter, direct light is guaranteed for 4 hours per day. 3.2 Yellow leaf restoration lighting plan For plants with sunburn spots, they should be moved to a scattered light environment for maintenance for 2 weeks, and gradually increase the light after new leaves germinate. Combined spraying of 0.1% potassium dihydrogen phosphate solution can accelerate chlorophyll synthesis.
By accurately identifying the causes of yellow leaves and taking targeted measures, and coordinating with differentiated management across the four seasons, mountain roses can maintain their emerald color. It is recommended to apply slow-release fertilizer every quarter to supplement trace elements, and rotate the flowerpot regularly to ensure uniform light reception, so that this "green rose among the rocks" will bloom for a long time.